| Absorbers, Shock | 695 |
| A.C. Ammeters | 269, 281 |
| Accessories, Inter-phone | 71 |
| Acetylene Gas Lights | 389 |
| Acid Syringe | 437 |
| A.C. Rectifier | 361 |
| A.C. Voltmeter | 269, 271, 281 |
| A.C. Watthour Meters | 298 |
| A.C. Wattmeter | 270 |
| Adapt-A-Lite | 667 |
| Adapter Plates | 1081 |
| Adapters | 980, 1100 |
| Adapters, Conduit Box | 921 |
| Adapters, Conduit Bushing | 1145 |
| Adapters, Flush Switch | 1082 |
| Adapters, Socket | 858 |
| Adjustarods | 1410 |
| Adjusters, Cord | 754 |
| Adjustolites | 698 |
| Aerial Cable Rings | 1427 |
| Ajax Insulator Brackets | 1402 |
| Ajax Varnishes | 823 |
| Alarm Apparatus | 469 |
| Alarm Fire Boxes | 474 |
| Alley Arm Braces | 1403 |
| All-Nite-Lite Transformer | 641 |
| Alloy Shunts | 267 |
| Almond Desk Portables | 665 |
| Almond Flexible Arms | 665 |
| Alphaduct | 1093 |
| Alternators | 114 |
| Alternators, Engine Driven | 115 |
| Alternators, Water Wheel Driven | 116 |
| Aluminum Wire | 1320 |
| Ammeters | 264, 268, 273, 279, 286, 337 |
| Ammeters, A.C | 269, 281 |
| Ammeters, D.C | 269, 276, 291 |
| Ammeters, Double Range | 287 |
| Ammeter Shunts | 274 |
| Ammeters, Miniature | 290 |
| Ammeters, Recording | 338 |
| Ammeters, Recording Shunt | 337 |
| Ammeters, Single Range | 287 |
| Ammeters, Switchboard | 286 |
| Ammeters, Triple Range | 287 |
| Ammeters, Zero Center | 289 |
| Ammeters, Zero Left | 289 |
| Ampere-Hour Meters | 292 |
| Anchor Rods | 1409 |
| Anchors, Earth | 1408 |
| Anchors, Everstick | 1411 |
| Anchors, Guy, Bierce | 1410 |
| Anchors, Harpoon Guy | 1409 |
| Anchors, Screw | 1425 |
| Anchors, Scrulix | 1408 |
| Angle Box Connectors | 1102 |
| Angle Clamps | 1368, 1376 |
| Angle Iron Cable Arms | 1405 |
| Angle Receptacles, Porcelain | 926 |
| Angle Reflector Fixtures | 686 |
| Annunciator Cables | 1311 |
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| Annunciator Lamps | 459 |
| Annunciators | 439 |
| Annunciator Wire | 1311 |
| Apartment House Inter-phones | 59 |
| Apex Soldering Irons | 612 |
| Apparatus, Telephone | 41 |
| Armature Cord, Samson | 819 |
| Armature Twine, Linen | 819 |
| Armor Cutters | 1101 |
| Armored Cable, Packard | 367 |
| Armored Conductors | 1094 |
| Armored Lamp-cord, Flexible | 1096 |
| Arms, Bo-Arrow | 1381 |
| Arms, Break | 1391 |
| Arms, Cable, Angle Iron | 1405 |
| Arms, Flexible, Almond | 665 |
| Arms, Mast | 801 |
| Arms, Transmitter | 103 |
| Army Duck | 813 |
| Arresters and Fittings, Garton Daniels | 226 |
| Arrestors, A.C. Lightning | 233 |
| Arresters, Horn type | 232 |
| Arresters, Lightning, Garton Daniels | 222 |
| Arresters, Lightning, Westinghouse | 213 |
| Arresters, Magnetic Blowout | 232 |
| Arresters, Multigap | 230 |
| Asbestos Cloth | 814 |
| Asbestos Mill Board | 815 |
| Asbestos Paper | 815 |
| Asbestos Station Cable | 1308 |
| Asbestos Tape | 814 |
| Asbestos Tubing | 814 |
| Asbestos Wood, Ebony | 815 |
| Attachment Plugs | 867, 914, 920, 979, 1074 |
| Attachment Plugs, Signal | 932 |
| Attachments, Incandescent Light | 908 |
| Attachments, Pull | 898 |
| Attachments, Quick Break | 1039 |
| Auger Bits | 1474 |
| Augers, Earth | 1442 |
| Augers, Port Hole | 1442 |
| Auto Brass Flex | 1091 |
| Autoflex Junction Boxes | 368 |
| Autoflex Switch and Fuse Box | 368 |
| Autoflex Tube | 1091 |
| Automatic Cord Winder | 374 |
| Automatic Drills | 1470 |
| Automobile Cables | 367, 369 |
| Automobile Cartridge Fuses | 350 |
| Automobile Cigar and Pipe Lighter | 373 |
| Automobile Heaters | 373 |
| Automobile Horns | 355 |
| Automobile Lamps | 376, 632 |
| Automobile Lights | 388 |
| Automobile Spark Coils | 346 |
| Automobile Switches | 382 |
| Auto Plug Connectors | 377 |
| Auto Steel Flex | 1091 |
| Auto Tool Sets | 1469 |
| Axes | 1482 |
| Ayrton Shunts | 326 |
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